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破砕性地盤における固結材の注入進展モードと支持力発現機構の解明

松软地基固结材料注入进度模式及承载力发展机理阐明

基本信息

批准号：
15760366
负责人：
大野司郎
金额：
$ 2.3万
依托单位：
Kinki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

破砕性地盤では粒子破砕を伴った大きな圧縮性が力学的要因となり,十分な支持力を得ることが難しいとされてきた.しかし近年,施工技術の発展により地盤と一体化させるような効果が期待できる基礎形態が開発され,破砕性地盤においても格段に支持力を改善できることがわかってきた.また,グラウト部分の施工方法の工夫により,固結性材料を注入することで破砕性地盤の圧縮性を大きく軽減することも期待されている.そこで本研究では,ドラム型遠心載荷装置を用いて固結性と破砕性を有する幾つかの模型地盤を作成し,地盤の特性種別毎に固結材の注入進展モードを観測し,それに基づいた支持力発現メカニズムを明らかにすることを目的とした研究を遂行した.1)まず,グラウト効果を見極めるため,昨年度まで実施していた固結材進展に関する透水性の把握として,小型遠心透水試験法の開発を行った.これは三軸応力状態で固結性材の浸透を見る際に簡便かつ精度良い透水係数の評価が必要となるが,その際の一次元方向の透水特性の基礎データとして有用となることがわかった.また,実際の固結材を進展させた小型供試体を一面せん断することによって,せん断強度を把握できる簡便な手法を提案した.この2項目により,注入進展過程と最終強度が簡便に評価可能となった.2)一方,遠心実験による地盤の浸透特性・破砕性に着目した支持力評価については,支持力メカニズムの把握のための実験システムの再検討が必要となった.これは遠心場における,浸透特性を観測する機器の不具合および遠心実験周辺の観測システムの不具合によるものが大きい,しかしながら,地盤の施工ロボットを新たに開発したことにより,今後浸透特性を考慮した支持力メカニズムを把握できる段階に進むことができた.

There is a great deal of support for the breakage of particles, which is associated with the development of the mechanics of sexual mechanics. In recent years, the construction technology exhibition, the construction technology exhibition, the integration of the earth and the earth, the construction technology exhibition, the integration of the construction technology, the construction technology, the integration of the construction technology, the construction technology, the integration of the construction technology, the construction technology, the integration of the construction technology, the construction technology, the integration of the construction technology, the construction technology, the integration of the construction technology, the construction technology, the integration of the earth, the earth, the earth, In this paper, the construction method is applied in a short period of time, and the consolidation materials are injected into the construction method. In this study, the cortical load device was built using a mechanical breakage model, and a variety of solid materials of geotechnical characteristics were injected into the progressive fatigue test. The basic support force shows that the objective of the study is to improve the effectiveness of the study. 1) the results show that the experimental results are very effective. Last year, the water permeability test was carried out, and the small-scale water permeability test method was carried out. The mechanical properties of solid materials are impregnated with solid materials. The accuracy is good. The number of permeable materials is very good. The number of permeable materials in the first-dimensional direction is very important. In order to improve the performance of the international mechanical properties, the development of the small-scale supplier is very important, and the strength of the material is very important. Project 2, inject the most powerful information into the process. 2) on the one hand, it is necessary to improve the performance of the system. 2) on the other hand, on the one hand, it is necessary to make sure that it is necessary to make sure that there is a significant impact on the permeability of the earth. The performance of the equipment is not in accordance with each other, and the equipment is not in accordance with each other. The equipment is not in accordance with each other, and the construction of the ground is not in accordance with each other. In the future, it is necessary to improve the performance of the equipment, such as the temperature, the temperature and the temperature.